Coking retort oven



J. VAN ACKEREINL coxme nmcjrvr ovnu Fil ed August 5. 1921 Jan. 26,1926. 1,570,s10

J. VAN ACKEREN sonne RETORT (mm Filed August 5. 1921 7 Sheetsf5h eet s Jan. 26 1.926.

J. VAN ACKEREN COKING RETORT OVEN FiledAugust 5. 1921 7 Sheets-Sheet 6 E CT/O/V 2 J. VAN ACKEREN sonne RETOR'I' ovxm Filed August 5. 1921 x &

Pa tehtecl Jan. 26, 1926.

UNITED STATES PATENT OFFICE.

JOSEPH vu ACKEREN, 01? IITTSIB'U'BGII, PENNSYLYANIA, nssmmin 030 zum xormms COMIANY, o1 PI'ITSBURGBZ, mumsnvnnm, A conronmrxon o1 mmxsarnwm xn.

COK ING RETOIBJ. OVEN.

' T0 all whom z't "may concern:

Be it known that I, JOSEPH VAN ACKEREN, a citizen of the United States, residing in Pittsburg({l 1, in the county of Allegheny and State of ennsylvania, have invente la new and useful Improvement in C0kin}; Retort Ovens, of which the following is a specification. 4

This invention comprehencls improvementS of general Utility in the coking refort m*en art; und also comprehends ce1ttain improvements especially ap'plicable to coking rtort ovens 0t' tl1e well-known cross-regenerative type exempllfied in the patent t0 H.

" Koppers N0. 818,033, dated April 17 1906.

j The invention has for -objects the provisi on of a c'oking retort oven having as impqrtant -characteristics: anoVel systern 0f fiow through the regenerators and'through the flues, that permits a Considerable reduction in the dimensions of the waste gas tunnels Which receivethe waste gases from the outflow operating regenerators, inasm1ich as the invention provides for the concuirent active employment.of the wastegas tunnels on both sides of an oven battery, with the resull: that euch waste gas tunnel need comn'uunicate with only one-half the total number of outflow operating regenerators, with a greatly decreased volurne of flow through euch tunnel. The improved constr'uction of the invention is furthermore of great imp1t'ance in oven battries fired' with extraneously-darived gas, such as producer gas, as the employment of such gas results in increased volume Qf combstion products and adequate flue spaces for the waste gas es mnst be provided to feed to the stack this m- 016ased volume of combustion products. By the inventioh, the Waste g3s tunnel construction may be adequately accommodated to such increased volume of combustion products and yet each waste gas tuhnel may be made approximately o'ne half the size 0f that employed in present practic.e. The iniprovements of the invention are furthermore applicable tp oven 'batteries 0f s tandard clesign, mid. may be inqorporated m such batteries, without resoiti1ig t0 rebuilding of the entire battery structure.

In addition to the general objects recited above, the inv'ention has for other objects such other improvemian'ts 01 advantages in constiuction sind Operation 'as arefo1ind. to

obtain in the structures and devices hereinaffr described or claimed.

In the accomPanying driwvings, forming a part 0f t his specification, and' showi1ig for purposes of exemplificatioh,. a preferred form and; manner in whicll the invention may be embodied und practiced, but without limiting the claimed invention specifically 'to sch illustrative instance 01' insta1'1cres;

F igure 1 is a, horizontal sectional view tht0ngh the regenerzttor anal waste gas tunne] Construct-ioxi of a coke oven batltelr'y embodying features above specified und equipped with the'improvement'sbf this.pres

ent inveni;ion;

Fig. 2 is a vertical section taken longitudinally 0f one of the waste gas tumielsin a plane indicated by the lirie A-A 0f -Fig. l; Fig; 3 is another horizontal se'tion through the regenei*ators of the coke oven' batte'ry, showing in plan the various conneC- ti ons a-nd deviqes for reversing' the flow %1rough the" regemerators sind through the ues; F ig. 4 is a vertical section taken longi tudinally of the battery through the air boxes and the Wasfie gas tunnel o1 stack flue,

and-shdwing the reversing ConnectionS on one side of the batterj Fig. 5 is a view simflar to F ig. 4, but showing the reversing connections on the other side of the battery; 1

Fig. 6 is an end view of the said reversing connections looking fromthe right band side of Fig. 3;

Fig. 7 is an enlarged transverse sectional elevation tak'en in a plane indicated by the linel BB of Fig. 3;

Fig. 8 is a crosswise vartical sectional elevation through a coke oven battery embodying features above specified, the view being taken longitudinally through a. heating wall und a pair of regenerators, in p1anes indicated by the line CC und BB of Fig. 9; and

Fig. 9 is a composite vertical seetional elevation taken longitudinally of the ecke oven battery, in plunes indicuted by the ]incs KK cf Fig. 8.

The same characters 0f referencc designate the same parts in euch 0f the severul vicws of the drawings.

In the embodirnent illustrated in the druwings, the invention is incorporated in a combination coke. oven battery, i. e., a battery. having provision for being operated efther With producer gas as the fuel 01 wifh the c0ke oven gas derived from the distillation 0f the coal in the coking chan1bers 0r retorts cf the battery. F01 convenience, the present description will be confined (o the present illustrated embodiment 0f the invcntion in such a combination ecke oven battery; .the novel fcatures and improvements made by the invention, are susceptible 0f other applications, such for example, as 01 dinary so-called coke ovens' employing cole ox en gas as the fue1, 01' ordinary S0- called gas ovensf employing producer gas as the fuel; hence, thc scope of the invention is not confined to the specific use und specific embodiment herein described as an illustiative example.

Referring to the drawings: the1e are illustrated views of a. ecke oven battery or plant of the by-product type, having feutures above specified: said overi battery embodies in its construction a plurality of crosswise clongated heatingwalls 11, 11, und a plurality of intermediate crosswise elongated. coking charnbers 12, 12. The heuting Walls form the side Walls of the 1espective coking charnbers 12, as shown more particularly in Fig. 9, und, in the present instance, are supported together With the ecking charnbers, by the heavy supportingpr pil1ar Walls 13, 13, which extend crosswise 0f the battery und are located, as shown in Fig. 9, beneath the superstructurc 0f the battery. These pillar Walls, collectively form the main Support f0r the entire superstructure of the 0ven battery, und are themselves supported upon a flat mat or platform which constitutes the subfoundation upon which thc entire battery rests.

The c0al t0 be coked i's churged into the several coking chambers or ovens through charging holes 1:4, locted in t he t0p 15 0f the oven battery und positioned directly above the ovens or chambers 12, as shown in Fig. 9. These charging holes 14 am equipped with the usual removable covers which are removed during the charging of the individual ovens 01 coking chambers und are pluced in position t0 close the tops 015 such coking chambel's during the entire C0ku 1g 01' distilling operation. The gases 0f dist1llution pass from the tops of the several coking chambers 12 through the usual gas outlets, and thence through ascension pipes, not shown, into the usua1 gas collecting main which ca.rrics the distillat ion products to the usual by-product recovery apparatus.

Heat for coking the charges of coul in thc sevcral ovens 01' chambers 12 is derived from the heating Walls 11, Which, as hereinbefore mentioned, extend crosswise of the battery at the sides of the coking chan1- be1s. Referring more particularly to Figs. 8 und 9, euch heuting Wall 11 is constituted 0f a plurality of flame 01 combustion flues 1T, The flame flues 0f each hea.ting Wall are, in uccordance with thc preseht embodiment 0f the invention, operutively disposed into tw0 groups, G und H, all of the flues 0f the several groups G operating f01 flow concurrently in one direction, while all of the flues of the severa1 groups H operate concurrently for flow in thc opposite direction. 'lhat is to say, when the flame flues 0f the several groups G are operating forinfioxv 0r burning, the. flame flues 0f the severul groups H ure operatiug for outflow t0 convey t0 the outflow opcrating regenerators the waste gase3 fr0m the burning flues. On reversul 0f thc buttery, the inflow operating flues, such us the flues .0f the several groups G, become outflow operating flues, und the 0ut- -flow operating flues, such as the flues of thc several groups H, become infiow operatir'1g flues.

The crosswise regenerators 18 of the ret0rt oven 01' battery are located at a lower level than the afolesaid heuting Walls 11 und coking chambers 12, und, in the present instancc, extend in parallelism betweren the pillar Walls 13. Locatcd in the middle lengthwise vertical plane of the coke oven batte-ry, is u vertical partition 19, as shown in Figs. 1 and 8, W111C11 partition extends all the way up from the mat cf the battery to the bottom 01 the overlying coking charmbers and from one toth'e other of the piL lar Walls 13. The regenerators which ure respectively located 0n opposite sides 0f the battery, extend oppositely from said partiti0n 19 und a1e separated thereby, as clearly shown in Figs. 1 und 9. This arrange- 1nent permits contr.ol from opposite sides cf the battery of the flow through the 1egenerutors und the flues. Euch regenerator 18 i's a chamber co-ntaining open brickwork, common1y called checkerwork, and indicated an 20 with a distributing ole channel 21 umlerncath such checkerwork, the channels 21- Accopding to the invention, the series K and L of regenerators that 9.18 respectively located on opposite sides of the battery, as shown in Fig. l, am operatively disposed into two groups M and N. Each group M 01 N comprises approximately one-half the regenerators on one side of the battery, the group M 01' N extending from one end of the battery to the cenpraltransverse partition T and being separated by said artition T from the other group of regenera-tors on the Same side of the battery. Moreover, as shwn in Fig. l, the two groups M of regeneiators which are respectively located 011 opposite sides of the battery are disposed at opposite ends of the battery, and the same arrangement obtains with respect to thetwo groups N of 1egenerators. All of the regenerators of the two groups M operate comcurrently f01 flow in the Same direction while all of the regenerators of the several grops N 31 'q operating concurrently for flow in the 0'pPosite direction. When he battery is burning producer gas 01 oth extraneousl derived gas as the fuel in the burning ame flues,.the several inflow oper ating regenerators, such as the regenerators of the groups M of both series K and L,- each compr1se gas regenerators P andair regenerators A; the gas regeneratprs alternatin with the air regeneratqrs in the man neu s own, while concurrently. all the regenerators of the several groups N are operating as waste gas regenerators W. 011 reversgl, the groups N of regeneratom that hereto fore operated. as waste -gas regenerators become gas and air regenerators and the groups M of regenerators c'oncurrently' becon'1e waste gas regenerators. According to the system of flow through the regeneb ators, inflow operating regenerators are disposed respectively irom the central partition T to the 0 posite ends of the battery 011 each side 0 the longitudinal artition 19, the waste gas regener&tors are similarly disposed, the inflow operating regenerators on one side of the partition 19 being aligned with the Waste gas regenerators on the other.

Withg this arrangement, waste gases discharge from groups of regen'erators concu rrently on both sides of the battery, instead o:f entirely 011 one side and then entirely onthe other, after a subsequent reversal-,' as has heretofor e been the common practice in this art.

The regenerators of each group M und. N are providedwith seri eS of duc ts 23,-all 0f whieh lead respectively t0 individual flame flues 17 of the same l1eating wall. With this construqtion, each fiame flue 17 communicates Joy a pair of ducts 23 with adjacenh separate regenerators of agroup M 01 N,

througl x which adjacent separate regenerators flowis maintained c0npurrentl m the sonne direction. At the ir tops, the ues are .practice.

provided with orts 24 which open up into horizontal o1 bus flues 25 forn1ed in the haaring Walls 11, and connecting all of the fiame flues of the groups G with the fiume flues 0f the groups H of the same heating wall.

Inasrnuch as according to the presentembocliment of the invention, the inflow operating fluesof euch heating Wall a1eon one side of the battery a'nd the outflow flu'es 0-f the same heating wall am on the othei side of the battery, the reversal of flow through the flues takes place crosswise of the bat: tery, in accordance with the usual Koppers However, during the period between eacl1.reversal, outflow is maintained alls 0n each sicle Of the battery, while inflow is maintained in the other groups of flues 011 'each side of the battery. 3"

The draft through the ports 24 may be regulat'ed by means of the usual dampers or sliding bricks 27, positioned in the ord-inary way in the bottoms of the horizontal flues 25 andadapted to be reached by access flues 28 whicl? extend from the tops of the horizontal flues in the several heating Walls to the top 15 of the battery, there. being an access flue ppsitioned over euch flame 01' combustion flu'e of each heating Wall.

Extending crosswise of the battery in the pilla.r Walls 13 and located beneath the beating wall 11 thereabove are pairs of gas supply Channels 29 und 30. Thesg channels 29 and 30 are for the purpose of sup'plying ecke oven gas to the several flame flues on each side of the central partition 19, and to accomplish this (end, the ehannels 29 com-' municate with the individual flues 17 by means of ducts 31 that lead from such chan- I 10 provided for admitting or cuttii1g ofi the supply of gas with resf elct to the channels 29 and 30, it being understood that the gas supply is either con0urrently maintained 01 concurrently shut ofl' from the channels 29 or 30.

Referring noW more particularly to Figs.

1 and 3, the sole channels 21 of the gro ups M of reg6nerators, of both series K and L of regenerators respect1vely communicate With flow boxes 33. The sole channels2l of the regenerators of the several groups N on both sides' of the-battery riaspec tively communi cate with flow boxes 34. Tl 1i's results in-.. an

arrangement of two series of flow boxes 33 139 and 34 along both sides of the battery, the flow boxes of each series being grouped from the centra1 partition T to the ends of the battery.

The several flow boxes 0f the series 33 are provided with lids 35 f0r opening and closing the interior 0f the respoctive flow boxes to the outer air, and the several flow boxes 0f the series 34 are respectively provided with similar lids 36. Ea ch air b0x lid 35 1nay be provided with a 1id operating lever 37 and each air box 1id 36 nmy be provided Wlith a similar lid operating lever 38.

Extending along euch side 0f the battery is a produccr gas main 46 leading from a. suitable source 0f supply 0f producer gas and adapted t0 be opened up to 01 shut off from its source of supply by means 01 any improved controlling valve. The valve that controls the supply into the producer gas min 46 is n0t here1n illustrated for the reason that the specific construction 0f such valve is immaterial to the present invention. Leading from the producer gas main on either side of the battery into alternate flow boxes 0f euch group 33 and into alternate flow boxes of each group 34 are branch producer gas supply pipes 47 and 48 respectively provided with control valves 49 and 50, it being unders tood that all 0f the control valves of the series 49 on both sides 0f the battery am open, while all of the-control vzplves of the series 50 on both sides of the battery are closed, 01 vice Versa.

In accordance with the invention, two Waste gas tunnels 01' stack flues 51 and 52 extend longitudinally of the battery, one 0n one side of the battery and the other 011 the other side, and merge at their discharge ends into a single tunnel 53 which leads to the stack 54. \Vithin each of the tunnels 52 and 53 is 21 valve 55 permitting each tunne1 to be opened up 0r shut 0If from comrnunication with the stack 54 as desired. The valves 55 1nay be adjusted in the manner 0f dampers t0 c0ntrol the flow through the respective stack flues 51, 52 in which such valves are I0- cated. The flow boxes 33 on both sides of the battery are provided with orts 56 that lead to channcls 57 which respectively communicute with one 01 the other of the stack flues 51, 52; similarly the flow boxes 34 on both sides of the battery are provided with ports 58 which 1ead t0 channels 59 communicnting with one or the other of the stack fluvs 51, 52. Vith this construction, the Wust0 gas tunnel 51 is connected by channels with the sex'eral air boxes that control the exhaust fr0m outflow operating regenerators 011 one sidc 0f the bnttery, and the waste gus tunnel 52 is independently connected by :1 fmther serios 0f channels with the flow box0s thut control the exhanst from the outflow operating rogenerators on the other side 0f the batter y. As outflow is maintaine concurrently in a group of the regenerators on each side of the battery, both of the waste g;as tunnels 51 and 52 operate concurrently t0 convey the waste gases from the battery to the sta'ck and, inasmuch as the volume of outflow is distributed between two tpnnels, instead 0f one, each waste gas tunnel may be only 'appr0ximatdy one-half the usual size, adequately to perform its function. This is an important advantage in byproduct c0ke oven construction, as it efi'ects a great saving in the construction work required to construct these stack flues 01' was te g-as tunnels.

The several flow boxes of each group 33 and 34 0n both sides of the battery are respectively provided With mushroom valves 60 and 61 for opening and closing the ports of their respective flow b 0xes W1th respect t0 the channels 1eadhg t0 the waste gas tunnels. The mushroom valves 60 are operated by valve ope-rating levers 62 and the mushrom valves6l are operated by va1ve operating levers 63. All 0f the valve operat- :ng levers of the series 62 and 63 are coutrolled and operated by a single cable 4 Which leads to the air valve -und. damper reversing machine 65. 011 one operation of the said machine 65, the mushroom valves of the flow boxes of the groups 34 on both sides of the battery are opened to establish communication between such flow boxes and the Waste gas tunnels 51 and 52, While 0011- currently the mushroom valves of the other groups of flow boxes 33 are closed ofl' to cut off such flow boxes from communication with the waste gas tunnels; an reverse operation 0f the machine 65, the mushroom valves of the groups of flow boxes 33 are opened while the mushroom valves 0f the groups 0f flow boxes 34 are closed to establish communication between the flow boxes 33 and the exhaust tunnels and 'concurrently to shut off the flow boxes 34 from communication with said exhaust tunnels.

According to the illustrated embodiment 0f the invention, the lids 35 of alternate flow boxes 33 only, are employed during producer gas operation and similarly alte1nate lids 36 only of the groups of flow boxes 34 are employed. Thepr'oducer gas Supply pipes 47 and 48 respectively lead to the other flow boxes of the groups 33 and 34. All of the 1id operating levers 37 and 38 of both groups 33 and 34 of flow boxes on both sides of the battery are controlled and operated by a reve1sing cable 3 which leads to the aforesaid revers1ng machine 65. One operation of said reversing machine 65 is eifected 130 open the lids 35 of the flow boxes of the roups 33 which function for air intake, WhiT0 comcurrently the 1ids 36 of the flow boxes 34 remain closed; reverse operation of the said reversing machix'1e is eifected to open the flow box lids 36 of the groups 34 whieh fung- 50 flow into all of the inflow operating flues tion for air intake and to close the flow box lids 35 of the groups 33.

The fuel gas valves 49 in the gas supply pipes 47 leading to the gas intake flow boxes of the groups 33 onboi1h sides of the battery are provided with operati ng levers 66; sim1 l'arly the fuel gas controlling valves 50 in the supp1y pi es 48 'lgading to the ga's intake flow'boxes 0 the groups 34 on both siles of the b8ttl{ are' rowded with 0 erating e serie 1evers 67. s of-operating evers 66 on both sides of the batt ery a re controlle'd und operated by cables 1 und 5, leading to the gas valve machine 68 ;'the series of valve operatinglevers 67 an both sides of the battery are controlled a.nd operated b cables 2 und 6 leading to the gas valve maq in'e 69. The Operation of;the gas valve machines 68 and 69 is eflective 110 openeither the entire series o f valves 49 on'-both sides of the battery a.nd close the'entire series of valves 50 or, on reversal, tpfqpe11 the entire series of valves 50 on bot h sides of the battery und.

- close the entire seties of v3.1yes 49. As indi-.

cated in Figs. 4 and' 5,the valves. 49 are in o en position and the valves 50 am in the c osed position.

The operation;qf the. bgtter' whe1i em'- ploying an extraneously de rive spedial generator as such as o'rd'ina. rodurier as g a y a is illustrated in the accom'panymgdrawmgs, assuming that the several regenerators of the groups M on both sides of the .battery am operating Tor inflow and that the sev(erl mgenerators of the groups- N, on both sides of the batte1y a re operating concurrently for outflow the several flues of the groups G on both sideS of thebattery a1e operating as burnin flues, yrhile downflow is maintained in t severa1 flues of the groups H. In so operatmfi, the mushroom valvgs 0 of the groups of w boxes 34 ar'e open while the mushroom valfies of the grou'ps of flow boxes 33 am closed; the air box 11d of the air intake flow boxesrof auch group 33 are open und the gas valves 49 of the gas intake flow.bo1tes of each group 33 am also opn; ooncurrently, the lids 36 cf the flow boxes of the group's 34 am closed, as wel'l as the ga.s valves 60 leading to flow b9xes of said grbu S With the arts arranged insch relgut1ve positions, produce1 gas flows into the seve1al inflow operating regenerators P ofthe g179ups M, while a1t flows into the 5 several inflow regenerators A of the same grou As both inflow operating regeneratorsg und A are conniacted with groups cf inflow operating flues G of the he.ting

walls; atmospheric air a'nd producer gas andi-gx1iting burns upwardly in said flues. The waste gases -from the b1'uning flues, comprisin the groups ass into the horizontal 0r us flues and flowin to the op'posite 05 sides of the battery fr'o1n' t e bu1ning fles,

p2iss downwardly through the outflo.w regenerators N into the severzil flow boxes 34 and thence through the open mushroom valv es into the waste as tunnels 51 and 52 011 both sides of the atter 011 reversal the sei eral regenerators an communicably connectedflues vqhich theretofore operated for inflow, become outflow re enerators und flues a1 1 d the previously outow operatii1g regenerators and flues are switched to inflow Operation.

When operating the batterj with coke oven gas as the fuel, theflow boxes of both groups 33 and 34 are cut ofl at alltimes 10m' the roducer gas mains 46. The lid operatin e'vers 37 and 38 of all of the flow boxes of 0th groups 33 und. 34 are operated at each reversal t.o pe'rmit air to flow into all of the flow boxes of either group 33 or 34. For this purpose the air reversing cable 33 is pro'vided with additional operating coimection's i: for efl'ecting the operation of when burning coke oven gas as the attery 'fuel. The flow through the battery takgg'. place, during coke oven gas operation, ni*

exactly the samemanner as when employing producer gas, the only exception being that all of the-inflow operating regenerators of either group M or N feed air to' the flue's mstead of air and producer gas, the fueI gas supp1y being derived from the fuel ga.s

the lid operating levers 37 and 38 emgloyed,

channels 29 an'd 30. In co ke oven gas 0 eration the waste gases pass in exactly t e same manner to and 52.

The invention as hereinubove set forth is embodied in a particulai form of construction but m ay be variously embodied within the scope oi the claims hereinafter made.

I cla1m:

1. In a coke oven battery in eomb'mation: a. lurality of coking chambers; heuting wa s contiguous to such coking Chamthe Waste gas channels 51 'bers and respec-tively constituted of vertical G Ing air va a.lve connections for the other regenerators of each group on both sides o:f-

the -battery; wastq gas tunnels loca-ted respectively-on oppo'site s ides of the.battery; und valve connections for establis hing communication concurrently between the outflow fegenerators oh, both sides of the battery respectively with the wasi:e gas tunnels on the same sides of the lc attery asthe eutflow regenerators; substantlally as specgroups of regenerators on each side of the battery disPosed at the 0 posite ends thereof; a producer gas supp y; reversing valve connections between seid producer gas supply and some of the regenerators of each group on both sides of the -battery; waste operativeli ges tunnels sides of the battery;xand valve conneet1ons gas tunnels and va'lve connections for establishing communication concurrently, between-the outfl0w regenerators on each side of the battery respectively with seid waste gas tunnels' substantially es specified.

3. 111 a coi: a plurality oi coking mbers; heating Walls conti 'ous to such coking chambers and respeet1vely eonstituted of vertical combustion flues; regenerators located below the coking chambers and the heating walls and parallel therewith, seid; regenerators being oommunicably connected with the flues and d1sp0sed. into inflow and outflow groups, t ere being inflow and outflow grou1)s of regeneretors on each side of the battery disposed at the 0 posite ends thereof; a produde'r gas sqpp y; reversing valve connections betWeen seid producer gas supply and some of the regenerators of eech group; reversing ein valve eonnections 'for the other re enerators of euch group; waste %ocated respectively on opposite folj establishing communicatiqn co neurrently between the outflov'v regeneratore respect ively with said wagte gae tunnels; eubstan e oven battexz, in combination:

verse center line cf the bette waste gas tunnels locatfed reepectively on opposite sides of the batt&ary; and valve con nections f'or establishing communication con currently between the outflow re enerators battery located below the coking chambers and the heating walls and parallel there- With, seid regenerators being communicably connected with the flues and oper tively disgosed into inflow and outflow gr ups, there eing inflow and oufaflow groups of regenerators on auch side of the battery disp'osed et -the op siteends thereof; waste as tunnele locate respectively on opposite s1des of the battery; and valve conneet1ons for establishing communication. concurrently between outflow reenerators on both sides of the battery wit seid waste gas tunnels; substantial1y es specified.

6. A coking retort oven provided with a. plurality of coking cha'mbers; flued heating walls; 1nfloW and outflow regenerators loeated on both sides of seid oven and disposed into groups et the opposite ends thereof waste gasi tunnels located res ctively 0n opposite s1des of seid oven; an valve counections for establishing communication coucurrently between the outflow oups of regenerators 011 both sides of sind oven with the waste gas. tunnels on the same sides of the oven es the regenerators; substantially es specified.

7. A coke oven battery p'rovid'ed with a plurality of co king chambers; flued h eating welle; inflow and outflow regenerators dis-' posed into groups -respectively' extending from the tra'nsverse central line of the battery to the ends the'reof;'waste gas tur mels located respectively on opposite sides of the battery; and valve conneetions for establishing communicetion concurrently between the groups of outflow regenerators and both seid waste gas tunnels; substantially es specified.

8. A ecke oven batter proyided with a plurality of coking cham rs; flued heating walls; inflow and outflow -gronps of;regenerators respectively exliending from the transto an end thereof, the inflo'w re nerators ei1igjointly operable ior conveymg air to the heating walls er separately operable for conveying thereto air and an extraneously derived gas;

wste gas tumlels located respectivel on op:-.j

posite sides of the battery; and v ve counections :Eor esta.blishing oommunication'con- Cur1entl betwegan t11e outflow regenerators erators arranged in series 011 each side of and bot said waste gas tunnels; substanthe battery; and waste as tunnels also 10- tially as specified.- cated 011 both sides of sa1d battery and hziv- 10 9. A ecke 0ven battery provided with a ing concurrent individual connections with 5 plurality of coking chambers; heating walls the regenerators 0f said groups; substanhaving but sii1gle rows of flues; groups of tially as specified. regenerators respectively comprising regen- JOSEPH VAN ACKEREN. 

